Automatic display for advertising or other poster

摘要

A series of rollers (110) supporting posters (116) are arranged within a casing and connected by a continuous chain drive. The chain runs over a pair of cylinders (210,220) which rotate about horizontal axes at the top and bottom of the casing.Each of the rollers includes a recall mechanism which tends to roll the poster about its roller in the absence of any exterior force. The recall mechanism also causes the drive chain to be tensioned such that the rollers are driven in sequence by simple frictional interaction with their respective cylinders.